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Mobile communication system, base station controller, base station, mobile station, and base station radio parameter control method

a mobile communication system and radio parameter control technology, applied in the field of mobile communication systems, can solve the problems of affecting the operation of mobile stations, affecting the reception quality of common control channels, and affecting the work efficiency of network administrators, so as to reduce the workload of network administrators

Inactive Publication Date: 2010-06-03
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a mobile communication system, a base station controller, a base station, a mobile station, and a base station radio parameter control method that can prevent problems caused by simulation errors and environmental changes, reduce the workload of a network administrator, and improve the accuracy of radio parameter control. This is achieved by a condition reporting unit that reports to the mobile station or another base station a measurement condition and a report condition used by the mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from the target base station, a measurement reporting unit that measures the reception quality level of the radio signal transmitted from the target base station if the measurement condition is satisfied, and a radio parameter control unit that controls a radio parameter of the target base station or the other base station based on the reported reception quality level.

Problems solved by technology

If the transmission power level of the common control channel is too low, the reception quality of the common control channel is reduced and the mobile station may not be able to operate properly.
Meanwhile, if the transmission power level is too high, the common control channel causes interference with other cells.
This in turn reduces the reception quality and prevents proper operations in other cells.

Method used

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  • Mobile communication system, base station controller, base station, mobile station, and base station radio parameter control method
  • Mobile communication system, base station controller, base station, mobile station, and base station radio parameter control method
  • Mobile communication system, base station controller, base station, mobile station, and base station radio parameter control method

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first embodiment

[0083]According to a first embodiment, functions for implementing the present invention are provided in the base station control unit 12 of the controller 1.

[0084]In this embodiment, it is assumed that the mobile communication system has a configuration as shown in FIG. 1.

[0085]FIG. 3 is a block diagram illustrating an exemplary configuration of the base station control unit 12 according to the first embodiment.

[0086]As shown in FIG. 3, the base station control unit 12 includes a network interface 121 that communicates with other controllers and base stations belonging to the controller 1 via fixed lines; a base-station-signal transmitting unit 122 for transmitting signals to the base stations via the network interface 121; and a base-station-signal receiving unit 123 for receiving measurement reports from the base stations via the network interface 121.

[0087]The base station control unit 12 also includes a measurement-and-report conditions generating unit 124 that generates a measu...

second embodiment

[0106]According to a second embodiment, functions for implementing the present invention are provided in the base station 2 (2#1, 2#2) instead of in the base station control unit 12 of the controller 1.

[0107]In this embodiment, it is assumed that the mobile communication system has a configuration as shown in FIG. 1. It is also assumed that the mobile stations 4 have substantially the same configuration as that shown in FIG. 5.

[0108]FIG. 7 is a block diagram illustrating an exemplary configuration of a base station control unit 12 according to the second embodiment.

[0109]As shown in FIG. 7, the base station control unit 12 includes a network interface 121 that communicates with other controllers and base stations belonging to the controller 1 via fixed lines; a base-station-signal transmitting unit 122 for transmitting signals to the base stations via the network interface 121; and a base-station-signal receiving unit 123 for receiving measurement reports from the base stations via ...

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Abstract

A mobile communication system includes a condition reporting unit provided in a base station controller and configured to report to a mobile station via the target base station or another base station measurement and report conditions for determining whether to measure and report a reception quality level of a radio signal transmitted from the target base station; a measurement reporting unit provided in the mobile station and configured to measure the reception quality level of the radio signal if the measurement condition is satisfied and to report the measured reception quality level to the base station controller via the target base station or the other base station if the report condition is satisfied; and a radio parameter control unit provided in the base station controller and configured to control a radio parameter of the target base station or the other base station based on the reported reception quality level.

Description

TECHNICAL FIELD[0001]The present invention relates to a mobile communication system, a base station controller, a base station, a mobile station, and a base station radio parameter control method.BACKGROUND ART[0002]To smoothly operate a mobile communication system, it is necessary to properly configure radio parameters of base stations such as the transmission power level of a common control channel. In a mobile communication system, a base station periodically transmits a common control channel to the entire cell and each mobile station is enabled to perform basic operations by receiving the common control channel. If the transmission power level of the common control channel is too low, the reception quality of the common control channel is reduced and the mobile station may not be able to operate properly. Meanwhile, if the transmission power level is too high, the common control channel causes interference with other cells. This in turn reduces the reception quality and prevent...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L12/26H04W24/10H04W52/08H04W52/32
CPCH04W24/10H04B17/24H04W52/325H04W52/08
Inventor MORI, SHINICHI
Owner NTT DOCOMO INC